农田与草地下垫面空气动力学粗糙度的研究  

Study on Aerodynamic Roughness Length on Crop and Grass Underlying Surfaces

作　　者：鞠英芹[1,2,3] 刘寿东[1] 马德栗[4] 刘绍民[3] 徐自为[3] 

机构地区：[1]南京信息工程大学大气环境中心,江苏南京210044 [2]中国气象局气象干部培训学院湖北分院,武汉430074 [3]北京师范大学遥感科学国家重点实验室地理学与遥感科学学院,北京100875 [4]武汉区域气候中心,武汉430074

出　　处：《科技通报》2016年第8期5-11,16,共8页Bulletin of Science and Technology

基　　金：中央高校基本科研业务费专项资金;国家自然科学基金项目(编号:40971194);(编号:30911130504)资助

摘　　要：利用2010年馆陶站和阿柔站涡动相关仪和自动气象观测资料,运用Yang et al.方法估算空气动力学粗糙度,分析了空气动力学粗糙度的时空变化特征,并将估算值与Brutsaert、Monteith、Zeng andWang、Bastiaanssen and Bandara、Teixeira五种参数化方案进行比较。结果表明:(1)空气动力学粗糙度与风向的关系取决于下垫面的非均匀程度;农田下垫面的空气动力学粗糙度随风向变化明显,具有方向性。(2)空气动力学粗糙度的季节性变化取决于下垫面植被(农田和草地)的季节性变化,与植被高度呈显著线性关系,与叶面积指数呈抛物线关系。(3)对于农田、草地下垫面而言,计算结果与Yang et al.方法估算值较为接近的参数化方案分别为Bastiaanssen and Bandara、Brutsaert。Based on the data of Eddy Covariance （EC） system and Automatic Weather Station （AWS）collected on Guantao and A’Rou sites in 2010,the method of estimating Aerodynamic RoughnessLength （z0m） is Yang et al. The results has been used to analyze the directional characteristics andseasonal variation.And then,the estimates are compared with the values from the value of using fiveparameterization schemes of Brutsaert、Monteith、Zeng and Wang、Bastiaanssen and Bandara andTeixeira.The result shows the directional characteristics of z0m is obvious in Guantao site. The value ofaerodynamic roughness length changes with wind direction due to heterogeneous degree of underlyingsurfaces.In addition, the z0m is essentially related to characteristics of the roughness elements, whichshowing a linear relationship with the vegetation height and a parabolic relationship with Leaf Area Index（LAI）. Meanwhile, Bastiaanssen and Bandara and Brutsaert is most close to the estimation ones by Yanget al. at Guantao and A’Rou sites, respectively.

关 键 词：空气动力学粗糙度 估算方法 参数化方案 

分 类 号：O357.4[理学—流体力学]